package com.whut.whutmall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.whut.common.constant.ProductConstant;
import com.whut.whutmall.product.dao.AttrAttrgroupRelationDao;
import com.whut.whutmall.product.dao.AttrGroupDao;
import com.whut.whutmall.product.dao.CategoryDao;
import com.whut.whutmall.product.entity.AttrAttrgroupRelationEntity;
import com.whut.whutmall.product.entity.AttrGroupEntity;
import com.whut.whutmall.product.entity.CategoryEntity;
import com.whut.whutmall.product.service.CategoryService;
import com.whut.whutmall.product.vo.AttrGroupRelationVo;
import com.whut.whutmall.product.vo.AttrRespVo;
import com.whut.whutmall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.whut.common.utils.PageUtils;
import com.whut.common.utils.Query;

import com.whut.whutmall.product.dao.AttrDao;
import com.whut.whutmall.product.entity.AttrEntity;
import com.whut.whutmall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Resource
    AttrAttrgroupRelationDao relationDao;

    @Resource
    AttrGroupDao attrGroupDao;

    @Resource
    CategoryDao categoryDao;

    @Resource
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        //1、保存基本数据
        this.save(attrEntity);
        //2、保存关联关系 注意：销售属性不用分组
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type",
                "base".equalsIgnoreCase(type) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() : ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());//查询条件
        if (catelogId != 0) {//如果指定了id
            queryWrapper.eq("catelog_id", catelogId);
        }
        String key = (String) params.get("key");//如果指定了关键字，需要模糊查询
        if (StringUtils.hasText(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        //条件查询
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),//分页查询
                queryWrapper//查询条件
        );
        PageUtils pageUtils = new PageUtils(page);//封装工具类
        List<AttrEntity> records = page.getRecords();//获取List<AttrEntity>记录

        //仅有AttrEntity的属性是不够的，所以要将其封装成加强版的AttrRespVo
        List<AttrRespVo> RespVos = records.stream().map((attrEntity) -> {//依次取出做map处理
            AttrRespVo attrRespVo = new AttrRespVo();//每一个数据都封装成AttrRespVo
            BeanUtils.copyProperties(attrEntity, attrRespVo);//拷贝基本数据，后需要增加三个数据：attrGroupId(这里没用)、catelogName、groupName

            //1、设置分类和分组的名字
            //查询Attr Attrgroup Relation表，获得一行数据，目的是通过attr_id获取attr_group_id
            if ("base".equalsIgnoreCase(type)) {
                AttrAttrgroupRelationEntity attr_id = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                if (attr_id != null && attr_id.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attr_id.getAttrGroupId());//通过attr_group_id获取attr_group表中的一行，即AttrGroupEntity
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());//获取AttrGroupEntity的组名
                }
            }

            //2、设置种类名
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(RespVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrEntity attrEntity = this.getById(attrId);
        AttrRespVo respVo = new AttrRespVo();
        BeanUtils.copyProperties(attrEntity, respVo);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            //1、设置分组信息
            AttrAttrgroupRelationEntity attrgroupRelation = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
            if (attrgroupRelation != null) {
                respVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());

                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelation.getAttrGroupId());
                if (attrGroupEntity != null) {
                    respVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }


        //2、设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);//分类的完整路径
        respVo.setCatelogPath(catelogPath);

        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            respVo.setCatelogName(categoryEntity.getName());
        }

        return respVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        //基本属性更新
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            //修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());//其实这个不用改，但是严谨一点

            //额外的属性
            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            if (count > 0) {
                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            } else {
                relationDao.insert(relationEntity);
            }
        }
    }

    /**
     * 获取当前分组关联的属性，比如：主体分组下的cpu、内存、存储、屏幕等
     *
     * @param
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        //在中间表pms_attr_attrgroup_relation中，根据attr_group_id查询attr_id
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());
        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }
        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
//        relationDao.delete(new QueryWrapper<>().eq("attr_id", 1L).eq("attr_group_id", 1L));
        //以上是多次发送删除请求，我们希望只发一次请求，批量删除
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     *
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1、当前分组只能关联自己所属分类里面的属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();

        //2、当前分组只能关联别的分组没有引用的属性
        //找到当前分类catelog_id下的其他分组attr_group_id
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map((item) -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //找到其他分组attr_group_id关联的属性attr_id
        List<AttrAttrgroupRelationEntity> group_id = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
        List<Long> attrIds = group_id.stream().map((item) -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //从当前分类的所有属性，找catelog_id相同，但是非其他组已经关联的属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }

        //如果有模糊查询条件
        String key = (String) params.get("key");
        if (StringUtils.hasText(key)) {
            wrapper.and((w) -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);
        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

}